Synthesis of gear-shaped ZnO microwires by chemical vapour deposition

Author

Qiu, Yijie ; Hu, L.Z. ; Yu, D.Q. ; Zhang, H.Q. ; Sun, J.C. ; Wang, Bingdong ; Ma, Jacob Xin ; Wang, L.N. ; Sun, K.T. ; Zhao, Z.W.

Author_Institution

Sch. of Phys. & Optoelectron. Technol., Dalian Univ. of Technol., Dalian, China

Volume

5

Issue

5

fYear

2010

fDate

10/1/2010 12:00:00 AM

Firstpage

251

Lastpage

253

Abstract

A tail-like cluster composed of zinc oxide (ZnO) microwires had been synthesised by a simple chemical vapour deposition method at high temperature. Most of the microwires exhibit an interesting gear-shaped microstructure. A new model is proposed to interpret the growth mechanism of gear-shaped ZnO microwires. It is suggested that the gear-shaped ZnO microwires are formed by a coalescence of ZnO fine wires. A distinct ultraviolet emission band centred at 389.8 nm is observed in the photoluminescence spectrum. The gear-shaped microwires with high surface-to-volume ratio are expected to improve the physical, chemical and biological sensitivity of ZnO, which will be helpful for the further application of ZnO in the field of sensor devices.

Keywords

II-VI semiconductors; chemical vapour deposition; crystal microstructure; photoluminescence; semiconductor growth; wide band gap semiconductors; wires; zinc compounds; ZnO; biological sensitivity; chemical sensitivity; chemical vapour deposition method; coalescence; gear-shaped microstructure; gear-shaped zinc oxide microwires; growth mechanism; photoluminescence spectrum; physical sensitivity; sensor devices; surface-to-volume ratio; tail-like cluster; ultraviolet emission band; wavelength 389.8 nm; zinc oxide fine wires;

fLanguage

English

Journal_Title

Micro & Nano Letters, IET

Publisher

iet

ISSN

1750-0443

Type

jour

DOI

10.1049/mnl.2010.0086

Filename

5623351